A positive point charge Q, with mass m, is immersed negatively charged uniform sphere with radius R. at a distance from its center. The total charge in the spherical charge distribution is -Q. Its mass is M>>m. a) Calculate the force exerted by the distribution of negative charge on the positive charge. b) Under the effect of the force the positive charge starts oscillating around the center of the sphere, while the sphere remains still. Please explain why. R c) Calculate the oscillation period. d) Calculate the kinetic energy of the system when the positive charge passes on the center of the negatively charged sphere.